EP0552525B1 - Aufhängevorrichtung - Google Patents

Aufhängevorrichtung Download PDF

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Publication number
EP0552525B1
EP0552525B1 EP92300551A EP92300551A EP0552525B1 EP 0552525 B1 EP0552525 B1 EP 0552525B1 EP 92300551 A EP92300551 A EP 92300551A EP 92300551 A EP92300551 A EP 92300551A EP 0552525 B1 EP0552525 B1 EP 0552525B1
Authority
EP
European Patent Office
Prior art keywords
hanger
ring
sealing
housing
teeth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92300551A
Other languages
English (en)
French (fr)
Other versions
EP0552525A1 (de
Inventor
Brian Saunders
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cameron International Corp
Original Assignee
Cooper Cameron Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cooper Cameron Corp filed Critical Cooper Cameron Corp
Priority to EP92300551A priority Critical patent/EP0552525B1/de
Priority to DE69219099T priority patent/DE69219099D1/de
Priority to NO930207A priority patent/NO305294B1/no
Priority to CA002087928A priority patent/CA2087928C/en
Priority to US08/007,419 priority patent/US5330002A/en
Publication of EP0552525A1 publication Critical patent/EP0552525A1/de
Application granted granted Critical
Publication of EP0552525B1 publication Critical patent/EP0552525B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/01—Sealings characterised by their shape

Definitions

  • US-A-4844510 provides complementary annular ratchet teeth on a hanger and on a surrounding spool or other housing but in order to allow appreciable variation in the height at which the hanger is to be suspended, the teeth on the hanger must extend over a significant axial length of the hanger.
  • the object of the invention is to reduce the completion height which has previously been necessary to accommodate such a hanger.
  • a hanger assembly for a wellhead comprises a tubular metal hanger having a portion with a series of axially spaced, external, annular ratchet teeth, a supporting device, which is arranged to be landed in a surrounding tubular housing and which is engageable with selected ones of the hanger teeth to suspend the hanger at a selected height within the housing; and a sealing device for sealing between the housing and the hanger, and, according to the present invention, such an assembly is characterised in that the sealing device includes a wedge and a metal sealing ring surrounding the toothed portion of the hanger and deformable radially inwardly into sealing contact with at least one of the hanger teeth by relative axial movement between the sealing ring and the wedge.
  • both the supporting and sealing devices engage the same toothed profile of the hanger, they may be spaced closely together, thereby leading to a shorter completion height in the wellhead than would otherwise be possible.
  • the sealing device may include a second deformable metal sealing ring and the action of the wedge, which may itself be formed by the second sealing ring, is also arranged to deform the second sealing ring radially outwardly into sealing contact with the surrounding housing.
  • the supporting device could, in theory, consist of a ring of circumferentially spaced dogs, it is preferably provided by a split landing ring, particularly of C-shape, having a series of axially spaced internal annular teeth complementary to the hanger teeth.
  • the landing ring is then radially expandable so that the landing ring may ride over the hanger teeth relatively down the hanger during suspension of the hanger.
  • an axial counter-reaction must be provided so that the movement of the wedge can be converted by wedging action into radial deformation of at least the first sealing ring.
  • This axial counter-reaction may be provided by the packoff which acts as an abutment for the sealing device.
  • the sealing device includes both the first and second sealing rings, the second ring forming the wedge
  • there may be a carrier tool for the sealing device the tool being arranged to be forced downwards to provide the relative axial movement and hence to energize the sealing device by deforming the two sealing rings
  • the packoff being a ring captively, but relatively axially movably, supported from the carrier tool by a sleeve passing down between wedge surfaces of the two sealing rings, whereby the carrier tool, sealing device and packoff ring form a unitary assembly.
  • a tubular hanger 3 has at its lower end a conventional screw threaded coupling 4 for connection to the upper end of a production casing string.
  • the hanger is shown suspended within a housing 5, situated, for example at a tie-back wellhead on a platform and fixed, directly or indirectly, to a riser extending down to a mudline suspension system of a subsea oil well.
  • the hanger 3 is carried in the housing 5 by means of a C-shaped radially expandable and contractible locking ring 6 which seats in a landing bowl 7 formed on the inner surface of the housing 5.
  • the outer surface of the hanger 3 is provided with an axially spaced array of annular teeth 8, each with a downwardly inclined upper flank, a substantially horizontal lower flank, and a blunt tip conforming to a substantially cylindrical envelope.
  • the landing ring 6 has a similar, but axially inverted, set of four axially spaced annular teeth 9, which complement the teeth 8.
  • a packoff ring 10 having a depending annular skirt 11 with a chamfered end 12, which can ride down over a chamfer 13 on the landing ring 6, to a position surrounding the landing ring, whereby the landing ring is held radially contracted and in secure engagement with the hanger. In this position a shoulder 14 on the packoff ring seats rigidly on the upper surface of the landing ring 6.
  • the packoff ring is a so called “Canh” sealing device consisting of two wedge sealing rings 15 and 16 which are located one on each side of a frustoconical portion 17 of a sleeve 18 having cylindrical end portions 19.
  • the lower end portion 19 is captively but axially movably coupled with the packoff ring 10 by means of a plurality of balls 20, which are located partly within an annular groove 21 of semi-circular cross-section in the sleeve 18, and partly within an annular groove 22 in the packoff ring 10, the groove 22 having a cross-section which is elongate in the axial direction.
  • the upper end portion 19 of the sleeve 18 is similarly captively, but axially movably, coupled by balls 23 to the lower end of a carrier tool 24.
  • the wedge sealing ring 15 seats on the top of the packoff ring 10, and the lower end of the tool 24 abuts the upper end of the sealing ring 16.
  • two cylindrical sealing surfaces 25 on the ring 15 seal against a respective pair of the teeth 8 on the hanger, while four annular sealing rings 26 on the ring 16 are in sealing engagement with the inner surface of the housing 5.
  • Assembly is carried out by suspending the hanger 3 and casing string stretched, with the hanger within the housing 5, and then forcing the landing ring 6 down around the hanger 3 by means of an hydraulic setting tool.
  • the ring 6 can ride down the hanger because of the ratchet effect of the inclined faces of the teeth 8 and 9, and this continues until the ring 6 lands in the bowl 7.
  • some of the teeth 8 may not be exactly aligned with the teeth 9, and the tension in the tubing spring is relaxed so that the hanger moves slightly down through a distance less than the pitch of the teeth 8, to the fully engaged position shown in Figures 1 and 2.
  • the hanger and tubing string are then secured against downward movement within the housing 5.
  • the sub assembly consisting of packoff ring 10, sealing device and carrier tool 24 are lowered down into the annulus between the hanger 3 and housing 5 until the skirt 11 rides around the landing ring 6, to hold the landing ring radially contracted and hence resist any relative movement between the landing ring and hanger in the event of upward compressive loads through the casing string.
  • the tool 24 is thereafter forced downwards to energize the sealing device, against a counteraction provided by the packoff ring 10 from the landing bowl 7.
  • the sealing device is held locked down by a mechanism comprising a split locking ring 27, which is held expanded in engagement with an annular seating in the wall of the casing by a packoff ring 28, and by an abutment ring 29, which abuts the underside of the ring 27 and is coupled to the tool 24 by a screw threaded connection 30.
  • the mechanism may be set by a second hydraulic setting tool which provides the necessary downward face on the tool 24 and then sets the seal device lockdown mechanism to maintain the axial compression in the sealing device, before removal of the second setting tool.
  • the operation of the second setting tool and lockdown mechanism is generally as disclosed in our EP-A-0421037.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Claims (6)

  1. Aufhängevorrichtung für einen Bohrlochkopf, umfassend eine rohrförmige aus Metall bestehende Aufhängung (3), mit einem Bereich, der eine Anzahl axial beabstandeter ringförmig angeordneter, nach außen weisender Sperrzähne (8) besitzt, eine Stützeinrichtung (6), welche so gestaltet ist, daß sie in einem umgebenden rohrförmigen Gehäuse (5) aufsetzen kann, und welche in bestimmte Zähne der Verzahnung der Aufhängung eingreifen kann, um die Aufhängung in einer bestimmten Höhe innerhalb des Gehäuses abzuhängen; und eine Dichtungseinrichtung zur Abdichtung zwischen dem Gehäuse und der Aufhängung, dadurch gekennzeichnet, daß die Dichtungseinrichtung eine Keileinrichtung (16) sowie einen Metall-Dichtungsring (15), welcher den gezahnten Bereich der Aufhängung umgibt und welcher radial nach innen in dichtenden Kontakt mit mindestens einem der Sperrzähne durch eine relative axiale Bewegung zwischen dem Dichtungsring und der Keileinrichtung verformbar ist, aufweist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Dichtungseinrichtung einen zweiten verformbaren Metall-Dichtungsring (16) enthält, und die Wirkung der Keileinrichtung auch dazu bestimmt ist, den zweiten Dichtungsring radial nach außen in dichtenden Kontakt mit dem umgebenden Gehäuse (5) zu verformen, um die Abdichtung zwischen der Aufhängung und dem Gehäuse zu vervollständigen.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der zweite Dichtungsring (16) die Keileinrichtung bildet.
  4. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stützeinrichtung ein geteilter Setzring (6) mit einer Anzahl von axial beabstandeten, nach innen weisenden ringförmigen Zähnen (9), welche zu den Zähnen (8) der Aufhängung komplementär angeordnet sind, ist, und der Setzring radial nach außen ausdehnbar ist, so daß der Setzring während des Abhängens der Aufhängung auf den Zähnen der Aufhängung, relativ unterhalb der Aufhängung, aufsitzen kann; und daß ein Packoff-Ring (10) vorgesehen ist, welcher axial zwischen dem Setzring und dem umgebenden Gehäuse angeordnet ist, um den Setzring radial zusammengedrückt zu halten und die Zähne am Setzring mit denen an der Aufhängung in Eingriff zu halten, wenn sich die Aufhängung in der gewählten Höhe befindet und der Setzring im Gehäuse aufgesetzt hat.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Packoff-Ring (10) als Gegenlager für die Dichtungseinrichtung (15, 16) dient, um eine axiale Gegenreaktion zur relativen axialen Bewegung zu bewirken.
  6. Vorrichtung nach den Ansprüchen 3, 4 und 5, dadurch gekennzeichnet, daß sie weiterhin ein Tragwerkzeug (24) für die Dichtungseinrichtung umfaßt, welches so angeordnet ist, daß es nach unten gedrückt wird, um die relative axiale Bewegung zu bewirken und damit durch Verformung der beiden Dichtungsringe (15, 16) die Dichtungseinrichtung zu aktivieren, und daß der Packoff-Ring (10) ein Ring ist, der eingeschlossen aber axial relativ beweglich ist, und durch eine Buchse (17), die zwischen den Keilflächen der beiden Dichtungsringe herunter verläuft, vom Tragwerkzeug abgestützt wird, wodurch das Tragwerkzeug, die Dichtungseinrichtung und der Packoff-Ring eine geschlossene Vorrichtung bilden.
EP92300551A 1992-01-22 1992-01-22 Aufhängevorrichtung Expired - Lifetime EP0552525B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP92300551A EP0552525B1 (de) 1992-01-22 1992-01-22 Aufhängevorrichtung
DE69219099T DE69219099D1 (de) 1992-01-22 1992-01-22 Aufhängevorrichtung
NO930207A NO305294B1 (no) 1992-01-22 1993-01-21 R°rhenger
CA002087928A CA2087928C (en) 1992-01-22 1993-01-22 Hanger assembly
US08/007,419 US5330002A (en) 1992-01-22 1993-01-22 Hanger assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92300551A EP0552525B1 (de) 1992-01-22 1992-01-22 Aufhängevorrichtung

Publications (2)

Publication Number Publication Date
EP0552525A1 EP0552525A1 (de) 1993-07-28
EP0552525B1 true EP0552525B1 (de) 1997-04-16

Family

ID=8211242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92300551A Expired - Lifetime EP0552525B1 (de) 1992-01-22 1992-01-22 Aufhängevorrichtung

Country Status (5)

Country Link
US (1) US5330002A (de)
EP (1) EP0552525B1 (de)
CA (1) CA2087928C (de)
DE (1) DE69219099D1 (de)
NO (1) NO305294B1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2160647C (en) * 1995-10-16 2002-05-28 Thomas William Garay Helical bearing anchor catcher
NO316808B1 (no) * 1998-03-26 2004-05-18 Vetco Gray Inc Kobling og fremgangsmate for tilknytning av et stigeror fra en plattform til et undervanns bronnhodehus
EP0952304B1 (de) * 1998-04-14 2001-06-20 Cooper Cameron Corporation Hängereinheit
US6302211B1 (en) * 1998-08-14 2001-10-16 Abb Vetco Gray Inc. Apparatus and method for remotely installing shoulder in subsea wellhead
GB2348655B (en) * 1999-08-24 2001-05-09 Fmc Corp Subsea tree coupling for mudline suspension system
US6969070B2 (en) * 2002-04-12 2005-11-29 Dril-Quip, Inc. Split carrier annulus seal assembly for wellhead systems
WO2004027202A2 (en) * 2002-09-17 2004-04-01 Dril-Quip, Inc. Inner riser adjustable hanger and seal assembly
US7445050B2 (en) * 2006-04-25 2008-11-04 Canrig Drilling Technology Ltd. Tubular running tool
US7552764B2 (en) * 2007-01-04 2009-06-30 Nabors Global Holdings, Ltd. Tubular handling device
US8720541B2 (en) 2008-06-26 2014-05-13 Canrig Drilling Technology Ltd. Tubular handling device and methods
US8074711B2 (en) * 2008-06-26 2011-12-13 Canrig Drilling Technology Ltd. Tubular handling device and methods
WO2010080294A2 (en) * 2009-01-09 2010-07-15 Cameron International Corporation Single trip positive lock adjustable hanger landing shoulder device
US8967245B2 (en) * 2011-05-24 2015-03-03 Baker Hughes Incorporated Borehole seal, backup and method
US20130068450A1 (en) * 2011-09-20 2013-03-21 Vetco Gray Inc. Wicker profile for enhancing lockdown capacity of a wellhead annulus seal assembly
US8752634B2 (en) * 2011-10-26 2014-06-17 Vetco Gray Inc. Segmented seal ring and support of same
US10563475B2 (en) 2015-06-11 2020-02-18 Saudi Arabian Oil Company Sealing a portion of a wellbore
US9482062B1 (en) 2015-06-11 2016-11-01 Saudi Arabian Oil Company Positioning a tubular member in a wellbore
US9650859B2 (en) * 2015-06-11 2017-05-16 Saudi Arabian Oil Company Sealing a portion of a wellbore
US10480273B2 (en) * 2016-01-11 2019-11-19 Fmc Technologies, Inc. Hybrid two piece packoff assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4844510A (en) * 1987-05-18 1989-07-04 Cameron Iron Works Usa, Inc. Tubular connector

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US4615544A (en) * 1982-02-16 1986-10-07 Smith International, Inc. Subsea wellhead system
US4759409A (en) * 1987-04-30 1988-07-26 Cameron Iron Works Usa, Inc. Subsea wellhead seal assembly
US4781387A (en) * 1987-06-15 1988-11-01 Braugh Benton F Metal to metal subsea casing hanger seal
US4790572A (en) * 1987-12-28 1988-12-13 Vetco Gray Inc. Tapered wedge packoff assembly for a casing hanger
GB2217795B (en) * 1988-04-27 1992-01-15 Fmc Corp Pack off system
US4842307A (en) * 1988-05-24 1989-06-27 Vetco Gray Inc. Wellhead load supporting system
GB8817554D0 (en) * 1988-07-22 1988-08-24 Cooper Ind Inc Positioning components & energising sealing assemblies thereof
US4949787A (en) * 1989-04-07 1990-08-21 Vetco Gray Inc. Casing hanger seal locking mechanism
US4949786A (en) * 1989-04-07 1990-08-21 Vecto Gray Inc. Emergency casing hanger
US4903992A (en) * 1989-04-14 1990-02-27 Vetco Gray Inc. Locking ring for oil well tool
US4942925A (en) * 1989-08-21 1990-07-24 Dresser Industries, Inc. Liner isolation and well completion system
US5025864A (en) * 1990-03-27 1991-06-25 Vetco Gray Inc. Casing hanger wear bushing
US5031695A (en) * 1990-03-30 1991-07-16 Fmc Corporation Well casing hanger with wide temperature range seal
US5086845A (en) * 1990-06-29 1992-02-11 Baker Hughes Incorporated Liner hanger assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4844510A (en) * 1987-05-18 1989-07-04 Cameron Iron Works Usa, Inc. Tubular connector

Also Published As

Publication number Publication date
NO930207D0 (no) 1993-01-21
DE69219099D1 (de) 1997-05-22
EP0552525A1 (de) 1993-07-28
NO930207L (no) 1993-07-23
NO305294B1 (no) 1999-05-03
CA2087928A1 (en) 1993-07-23
US5330002A (en) 1994-07-19
CA2087928C (en) 2003-12-30

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